Natural gas purification wastewater is mainly divided into normal production wastewater and maintenance wastewater.
The concentration of pollutants in normal production wastewater is low and can be treated by general biochemical treatment.
The maintenance sewage contains a large number of complex biodegradable substances, biodegradability is poor, for many years mainly rely on fresh water dilution treatment and combustion furnace treatment, but these two methods are low efficiency and high cost, so it is necessary to develop new wastewater treatment
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Although we have studied the upflow anaerobic sludge bed reactor (UASB) for the treatment of high concentration sewage of the natural gas purification plant, the start-up test results of 133 days show that the effluent COD removal rate is only about 40% when the influent COD is 6000mg/L, and the treatment effect is not good.https://www.chinactivecarbon.com/
https://www.chinactivecarbon.com/Therefore, it is of practical significance to explore and seek an effective pretreatment method.
In this paper, Fenton oxidation and activated carbon adsorption were combined to pretreat the wastewater from natural gas purification maintenance, in order to improve the subsequent operation efficiency of UASB.
This experiment by orthogonal test to determine the Fenton reagent oxidation first preliminary operating conditions, on this basis, carries on the single factor analysis method, the main factors influencing the Fenton reagent treatment effect for each study, investigation of its influence on wastewater COD removal rate, the results show that Fenton oxidation method the optimum operating conditions for natural gas purification overhaul wastewater treatment: HO2 dosing quantity 0.3 mol/L, n (HO)/n (Fe) = systematically, initial pH = 3, reaction temperature 70 ℃, reaction time, 40 min.Stability is reflected in the fact that the economy performed within an appropriate range, growth became more stable, and the quality and performance of the economy continued to improve.
The economic structure has continued to improve. Innovation is playing an increasingly important role in underpinning development. The service sector accounts for a larger share of the economy, and consumption is contributing more to growth.
Stability is also reflected in new breakthroughs in reform and opening up.
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